There is a desire to put a “button” plugin LikeBtn (http://likebtn.com/en/) within the forum bbpress (see. Wallpapers)
What will advise?
How to find the place where to insert the code <? Php likebtn_comment (); ?>
You what want the plugin to add the button after the reply content, if you can hook it use bbp_theme_after_reply_content or you can modify loop-single-reply.php and add it after <?php do_action( 'bbp_theme_after_reply_content' ); ?>